含蒸发式稳定器模型燃烧室的液雾两相燃烧数值模拟  

Numerical Simulation of Liquid Fog Two-phase Combustion in Combustion Chamber with Evaporative Stabilizer Model

作　　者：黄金智 徐天赐 周杰 宋亚恒 叶桃红[1] HUANG Jinzhi;XU Tianci;ZHOU Jie;SONG Yaheng;YE Taohong(Department of Thermal Science and Energy Engineering,University of Science and Technology of China,Hefei 230001,China;Xi'an Aerospace Power Research Institute,Xi’an 710199,China)

机构地区：[1]中国科学技术大学热科学和能源工程系,安徽合肥230001 [2]西安航天动力研究所,陕西西安710199

出　　处：《工业加热》2024年第3期14-19,共6页Industrial Heating

摘　　要：带蒸发式稳定器的燃烧室通过向稳定器蒸发管内供油的方式,改善稳定器下游的油雾分布,在低压和低油气比等极限工作条件下提高燃烧室的燃烧性能。然而由于蒸发管内存在燃油雾化、液滴碰壁飞溅以及蒸发等过程,难以直接对蒸发管内的物理过程进行数值模拟得到稳定器下游的油雾场分布。对于燃油蒸发管内部复杂的物理过程,根据蒸发管内部流动特性提出蒸发管雾化简化模型,并在欧拉-拉格朗日框架下,采用PaSR湍流燃烧模型结合动态自适应建表(ISAT)方法,对含蒸发式稳定器模型燃烧室在低压条件下的流动及两相燃烧开展数值模拟,得到的燃烧室横截面燃气温度以及燃烧效率的模拟结果和实验接近,表明提出的简化蒸发管雾化模型能够给出合适的稳定器下游燃油分布以及燃烧场计算。The combustion chamber with an evaporative stabilizer improves the spray distribution downstream of the stabilizer by supplying fuel to the evaporator tube,enhancing combustion performance under extreme working conditions such as low pressure and low fuel-air ratio.However,due to the presence of processes like fuel atomization,droplet wall impingement,and evaporation within the evaporator tube,it is challenging to directly simulate the physical processes inside the tube to obtain the spray field distribution downstream of the stabilizer.Regarding the complex physical processes inside the fuel evaporator tube,it proposes a simplified atomization model for the evaporator tube based on its internal flow characteristics,and under the Euler-Lagrange framework,the PaSR turbulent combustion model combined with the in-situ adaptive tabulation(ISAT)method is used to analyze the model combustor with evaporation flameholder.The flow and two-phase combustion of the combustor under low pressure conditions are numerically simulated.The simulation results of the cross-sectional gas temperature and combustion efficiency are close to those of the experiment.It shows that the proposed simplified evaporation tube atomization model can give a suitable distribution of fuel downstream of the flameholder and combustion field calculation.

关 键 词：欧拉-拉格朗日方法 蒸发式稳定器 蒸发管 

分 类 号：TK16[动力工程及工程热物理—热能工程]